Compilare: main.cpp: In function 'int main()': main.cpp:101:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < eg23.size() ; i++){ ~~^~~~~~~~~~~~~ main.cpp:114:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < eg12.size() ; i++){ ~~^~~~~~~~~~~~~ main.cpp:127:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( i = 0 ; i < eg13.size() ; i++){ ~~^~~~~~~~~~~~~ main.cpp:140:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < dif.size() ; i++){ ~~^~~~~~~~~~~~ main.cpp:11:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&n); ^ main.cpp:12:33: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets (a + 1 , n + 10 , fin); ^ main.cpp:13:33: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets (b + 1 , n + 10 , fin); ^ main.cpp:14:33: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets (c + 1 , n + 10 , fin); ^